Alloy



Patented Nov. 13, 1934 Armor Henry Edwin Holbrook, Irvington, N. 1., Minor to The H. A. Wilson Company, Newark, N. 1., a. corporation of New Jersey o No Drawing. Application June 18, 1933. I Sfl'ill N0. 676,092

2Claims.

istics are attained in a high degree in contacts 16 which are well adapted for use in electrical apparatus when an alloy is employed containing osmium as a major alloying element. Preferably the osmium is present in the alloy in an amount ranging between 50% and 90%, the proportion 20 which I have found best being about 66% or two parts out of three by weight. The remainder of the alloy is preferably made up of one of the metals rhodium, platinum, palladium, iridium and ruthenium.

The best results in the practice of my invention are attained inan alloy consisting mainly of osmium, and secondarily of rhodium. Preferably these two constituents are present in the relation of 66% osmium and 34% rhodium by weight.. w This composition hasbeen productive of the best resultsjwhich' I have attained, but it must be understood that there may be some variation without substantial sacrifice in the operating results. The dominant feature of the invention resides in the use of osmiumv as the major element of the alloy. The proportion of the osmium should be at least 50%. and it may; be carried as high as 90%, though,,as above stated, 66% is the amount which has been found to be best.

Much of the remainder of the alloy, preferably all of it, consists of one of the metals, rhodium, platinum, palladium, iridium and ruthenium, and the alloy of osmium and rhodium'in-the relationof two to one by weight has been found to be best;

Iclaim: f a I 1. An alloy containing, osmium in anamount between 50% and the remainder being thedium. v I 2 An alloy composed of commercial osmium and commercialrhodium, the osmium comprising about 68% and the rhodium about 34% by weight. oo

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